Breakdown (mechanical) of int fix of bones, subs

This code signifies a mechanical failure or breakage of an internal fixation device (e.g., plate, screw, rod) that was implanted to stabilize a fracture or osteotomy in a bone other than a joint prosthesis or specific internal fixation devices (e.g., spinal fusion, limb lengthening). This breakdown is causing symptoms or requiring intervention during a follow-up visit after the initial treatment.

Use this code when a patient presents for a subsequent encounter due to a mechanical issue with an internal fixation device in a non-joint bone, such as a long bone shaft or a facial bone. This would include scenarios where a screw has backed out, a plate has fractured, or a rod has bent, necessitating further medical attention.

• Ensure the documentation clearly states a mechanical breakdown, not an infection or other complication.
• Verify the internal fixation device is for "other bones" and not a joint prosthesis or a device with a more specific T84 code.
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.